BMW 1 Series F20 (2011 - 2015) Radiator Coolant Overflow Tank
Our Fitment Promise
Designed for straightforward out of the box fitment and operation. If there are any fitment issues, we will cover the return cost in full because we stand behind our products.
Have a question? Ask our team of automotive experts!
- Genuine / Aftermarket Aftermarket
- Type Coolant Overflow Tanks
- Make BMW
- Model 1 Series
- Series F20 [2011 - 2018]
This replacement radiator coolant overflow tank delivers exceptional performance for BMW 1 Series F20 (2011 - 2015) vehicles. Manufactured to surpass original equipment standards, this precision-engineered component handles extreme operating conditions while preserving your cooling system's reliability and efficiency.
Technical Details
- Condition: 100% Brand New
- Construction Material: Premium Grade Plastic
- Finish: White
- Level Sensor Included: Yes
- Pin Configuration: 2
- Cap Included: no
- To Radiator Inlet Outlet Hose Outer Diameter: 10mm
- To Radiator Outlet Hose Outer Diameter: 16.5mm
- Suitable with Expansion Tank Cover Diameter: 48mm
Performance & Construction
- OEM-Grade Design: Precisely manufactured to original equipment dimensions and specifications for seamless coolant level monitoring.
- Superior Build Quality: Constructed from high-quality plastic materials ensuring dependable performance and extended service life.
- Simple Installation: Perfect OE fitment and design specifications allow for straightforward direct replacement.
Vehicle Application
-
Compatible Models:
- BMW 118i F20 models from years 2012, 2013, 2014 and 2015.
- BMW 125i F20 models from years 2011 and 2012.
Included Components
- 1 x Radiator Coolant Overflow Tank
Perfect for BMW 1 Series F20 drivers needing to replace worn or faulty coolant overflow tanks, this aftermarket solution provides dependable OE-quality performance while maintaining proper fit and function.
Since cooling system components are essential for vehicle safety and operation, always confirm fitment compatibility with your exact vehicle specifications. We recommend professional installation for optimal results.
Every order except for oversized items will automatically receive free standard shipping, so you can get your items without any additional cost.
If you need your order faster, express and same-day delivery options are available at checkout. Express and same-day delivery fees vary depending on the product and delivery location, so we’re unable to provide a standard rate in advance — the cost will be shown once your items are added to your cart.
We aim to provide same-day dispatch for all weekday orders placed before 12:00 PM (AEST during standard time or AEDT during daylight saving).
Once your order has been dispatched, you will receive an email notification with your tracking details. Tracking information may take up to 24 hours to appear, and please check your spam or junk folder if you don’t see the email in your inbox. Tracking is always included for orders above $50. For orders below $50, tracking will be provided if available.
For international orders, please note that shipments may be subject to import duties, taxes, and customs processing fees, which are applied once the package reaches its destination country. These charges are not included in our shipping fees and are the responsibility of the recipient.
Important Notes: While we strive to provide accurate delivery estimates, delays may occur due to stock availability, courier conditions, or other unforeseen factors. We appreciate your understanding and patience in these situations. Regardless of order value, every item is packed with care and delivered as promptly as possible.
All orders are covered by our free Standard Return & Refund Policy.
If you change your mind, you can return any unused, uninstalled product in its original condition at any time (there is no time limit) for store credit.
If your item arrives defective, damaged, or incorrect, please notify us within 30 days. We cover return shipping for confirmed defects or errors and will provide either a replacement or a full refund to your original payment method.
For change-of-mind returns, you’ll need to cover the return shipping cost. To start the process, simply fill out the required fields in our contact form.
All approved change-of-mind returns are processed as store credit only. Once your item has been received and inspected, processing may take up to 15 business days.
Every return is handled with care to ensure a fair and reliable process.
If your item arrives defective, damaged, or incorrect, please notify us within 30 days. We cover return shipping for confirmed defects or errors and will provide either a replacement or a full refund to your original payment method.
OEM-Standard Radiator Coolant Overflow Tanks
Don't settle for cheap replacements, choose lasting reliability. Built to OEM specifications for precise fitment and dependable cooling system performance. Manufactured from heat-stabilised polymers and pressure-tested to prevent leaks, distortion, or cracking. Every unit is inspected to ensure long-term durability under continuous thermal cycling.
Select a numbered point above
Tap any marker to discover the engineering behind each component.
Component Breakdown
Engineering features explained
Pressure-Rated Cap Interface
Designed to maintain correct system pressure and prevent coolant loss. Compatible with OEM-spec radiator caps to ensure safe venting and consistent operating temperature.
Heat-Resistant Polymer Construction
Manufactured from high-grade, heat-stabilised plastic for maximum strength and resistance to deformation under engine bay temperatures. UV-treated to prevent discoloration and brittleness over time.
Precision Molded Mounting Points
Factory-matched mounting tabs ensure exact alignment with original brackets. Designed for quick installation and secure attachment without modification.
Reinforced Hose Connectors
Integrated inlet and overflow ports are reinforced for leak-free performance. Tested for pressure and vibration resistance to ensure consistent coolant flow between radiator and reservoir.
Integrated Fluid-Level Indicator
Semi-transparent tank design allows easy visual monitoring of coolant levels. Markings correspond to OEM fill lines for accurate fluid management and maintenance checks.
